<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="jquery-3.2.1.min.js"></script>
</head>
<body>
    <div>
        111111
        <span>瓜皮冒泡</span>
    </div>
</body>
<script>
    $('span').bind('click',function(event){
        console.log(1);
//        event.stopPropagation();
        event.preventDefault();
//        return false;
    })
    $('div').bind('click',function(){
        console.log(22);
    })
    $('body').bind('click',function(){
        console.log(333);
    })
</script>
</html>